Well, if this isn't the most unique thing I've seen in a while! It's a convention, July 17-20 in Mankato, Minnesota, completely devoted to the Betsy-Tacy books by Maud Hart Lovelace. They're hosting games, tours, some discussion panels and Meg Cabot will be guest-speaking.
I've got to admit, I never the read the books when I was a child, but these days they are my very first recommendation to parents who come to me looking for something challenging yet wholesome for their precocious seven or eight year old girls who are strong readers. I also recommend them for girls who are intrigued by Anne of Green Gables or Little Women but not quite at that reading level yet. For those voracious readers who have finished all of the Little House books (and the seemingly dozens of Little House spin-off series by other authors) and are looking for more, Betsy-Tacy would be a pretty safe bet.
I can't imagine ever getting out that way anytime soon, but still, it certainly sounds interesting!